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Open research questions in Fluoride Effects and Removal

94 gap statements mined from Fluoride Effects and Removal papers in our 4.5M-paper local library, which holds 978 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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  • Overall, given the absence of significant differences between the TiF₄ formulations and the commercial product, our findings suggest that these toothpastes are equivalent in their ability to maintain intraoral fluoride reservoirs, supporting further investigation of their potential in caries models.

    Intraoral fluoride retention after using experimental toothpaste containing titanium tetrafluoride and chitosan · 2026 · DOI

  • The pathophysiology of fluorosis is not limited to the skeletal system; it also leads to DNA damage by triggering oxidative stress at the cellular level.

    Oxidative DNA Damage in Sheep with Endemic Fluorosis: Evaluation of 8-OHdG · 2026 · DOI

  • Significant cytotoxicity may be encountered in some toothpastes, but the underlying in vivo mechanisms need to be studied in detail. Cytological evalua- tion was limited to the 12-week study period, and post-inter- vention persistence or reversibility of cytogenetic changes was not assessed. However, the identified cytological changes should be interpreted cautiously, as the clinical relevance of these preliminary findings remains uncertain.

    Comparative evaluation of the cytotoxic effects of fluoridated and non- fluoridated toothpaste on the buccal mucosa: A 12 week follow up- a randomized controlled study · 2026 · DOI

  • regulatory oversight of water supplies. Attitudes toward fluoride as a public health concern were broadly positive but did not translate into proactive protective behaviors, and Practices scores reflected largely passive engagement with fluoride risk reduction across both programs. in the Curriculum updating is a recognized approach to addressing knowledge gaps, although our design cannot confirm its effect in this setting, and older students and recent graduates may miss out on such updates and would benefit from supplemental educational materials, form of continued medical education (CME). Continuing education is an effective route for updating clinicians already in practice, particularly when it is interactive and delivered as repeated rather than one-off (36). Targeted, reinforced modules on fluoride toxicity could close the cohort gap leaves open. Campaigns aimed at senior students, recent graduates, and the existing workforce are needed to raise awareness, correct entrenched misconceptions, and ensure that clinicians can recognize and manage both the dental and non-dental faces of fluorosis. that curriculum reform alone With water scarcity in Jordan and the poor socioeconomic status of some of the regions with endemic fluorosis, affected populations often don’t have the option of seeking alternative sources of water and are left with a potentially contaminated water as their only source. Therefore, increasing awareness and preparedness of the workforce to deal with the complications arising from it is, albeit important, not enough and effort should be made to ensure the safety of the water they consume (37). Where groundwater fluoride exceeds the WHO limit, defluoridation and alternative-source provision are the only durable protections, and low-resource their endemic settings deserves explicit policy attention (38). feasibility in The finding that 63.6% of participants were unaware of or uncertain about public fluoride monitoring in water supplies points to a transparency gap that health authorities should address by strengthening public reporting mechanisms and ensuring alignment with the WHO guideline. Finally, a longitudinal tracking study is needed to verify the true relationship between curricular reform and changes in knowledge. Following successive cohorts through their training, with course content, teaching hours and instructional method documented as process variables, is the only design that can distinguish a genuine curricular effect from a cohort difference or from decay of knowledge across the years of study, which is a distinction our cross-sectional data cannot make. Future work should also assess whether educational interventions produce sustained KAP improvements, and should extend to other Jordanian universities, healthcare disciplines, and fluorosis-endemic regions, where the public health risks are the highest.

    Assessment of medical and dental students' knowledge, attitudes and practices related to fluoride exposure: a cross-sectional study from Jordan · 2026 · DOI

  • Domestic water and dental caries, V, additional studies of the relation of fluoride domestic waters to dental caries experience in 4,425 white children aged 12–14 years of 13 cities in 4 states.

    Water fluoridation today: – benefits and challenges · 2026 · DOI

  • impact, equity, economic Based on the available evidence and comparative evaluation of health safety, and implementation feasibility (Figure 1), policymakers considering population-level fluoride exposure policies may consider several strategies to support effective and equitable prevention of caries. impact, First, governments should maintain existing CWF programs at recommended concentrations where infrastructure and regulatory capacity already exist. Maintaining programs preserves a population-level prevention strategy that can reach entire communities regardless of access to dental care. Second, policymakers may consider expanding fluoridation coverage in jurisdictions where centralized water infrastructure makes implementation feasible. Expansion strategies should be accompanied by regulatory oversight, monitoring systems, and transparent public communication to maintain safe fluoride resource- concentrations and trust. support public constrained settings where CWF may be feasible, policymakers should consider alternative population-level fluoride delivery strategies, such as greater reliance on other preventive approaches tailored to infrastructure and governance systems.

    Community water fluoridation policy and population oral health: a policy analysis · 2026 · DOI

  • This study revealed fluoride bio-accessibilities below 100% for the majority of analyzed food/meal samples, indicating that part of consumed fluoride is unavailable for utilization in the human body. It also underscores the significant variability in fluoride bio- accessibility across different dietary sources, probably influenced by both the chemical composition of the consumed items and the digestion process itself. The static in vitro digestion model used for this study fails to fully capture the dynamics of fluoride release and absorption in the human gastrointestinal tract. Furthermore, the complexity of analyzed food matrices could have prevented the release of fluoride ions at any stage of the experiment, rendering it undetectable. Due to their high viscosity and sticky texture, dietary sources like peanut butter and jam further complicated the digestion process and release of fluoride ions highlighting the need for more sophisticated models and experimental designs to accurately measure fluoride content and its bio-accessibility. Therefore, future studies utilizing dynamic digestion models that more accurately replicate the dynamic nature of human digestion and identify factors influencing fluoride absorption are needed. This is particularly crucial during early childhood, a period when the risk of dental fluorosis is highest. While the present study focused on dietary patterns and fluoride exposures in the USA, future research should encompass a broader range of dietary patterns and regional fluoride exposures. Investigating the impact of other dietary components, such as calcium and iron, on fluoride bio-accessibility is also essential. Furthermore, it is recommended to include all types of milk (e.g., breast milk, plant-based milk, specialized in future studies to provide a more comprehensive formula) understanding of fluoride bioaccessibility in infants.

    Assessment of fluoride bio-accessibility in early childhood diets · 2025 · DOI

  • a comprehensive view of how changes in water fluoridation over time affect different age groups in terms of both dental caries and fluorosis. By analysing these two groups, the study aims to comprehensively understand the full spectrum of effects of fluoride exposure, from a younger generation with minimal well water to an older generation with considerable exposure. This approach allows for a nuanced analysis of the changes in dental health trends related to the termination of well water usage in Alrass City. younger demographic, exposure offering against the 2.3.3 Inclusion and exclusion criteria Residents aged 6–50 years born in Alrass City who never migrated to another city were included. Residents of Alrass City not born in the city, as well as individuals with medical conditions that could affect their oral health, were excluded. In addition to excluding residents not born in Alrass City and affecting oral health, individuals with medical participants with conditions that could alter fluoride excretion, such as kidney disease, were also excluded from this study. This was done could potentially influence the study’s outcomes on dental caries and fluorosis. confounding variables to minimize conditions that 2.3.4 Sampling method This study employed a stratified random sampling technique. Schools were defined as the primary sampling sites for children, whereas public places, such as shopping malls, hospitals, and academic facilities, served as sampling sites for adults. The population was stratified based on two key factors: (a) Age groups: Children (6–17 years) and Adults (18–50 years) (b) Geographical regions: North, South, East, and West of Alrass City. The schools were stratified by region (north, west, east, and south of Alrass City), and a random sample of schools was selected from each region to regional representation. Similarly, public places were chosen based on their demographic distribution and accessibility. adequate ensure 2.3.5 Participant recruitment process Schools were randomly selected from each geographical stratum (north, south, east, and west of Alrass City) using a random number generator. The sampling frame was established using a comprehensive list of all primary and secondary schools in Alrass City, which was obtained from the local education authorities. This ensured that the recruitment process covered the full range of schools catering to children aged 6–17 years. zones were defined based on the

    Associations between community water fluoridation cessation and the prevalence of dental caries and fluorosis in Alrass city, Saudi Arabia · 2025 · DOI

  • Future research should focus on integrated, site-specific F management strategies, leveraging machine learning models and advanced technologies for real-time monitoring and precise management of F bioavailability.

    Fluoride Accumulation in Tea Plants: Soil-Plant Interactions, Health Risks and Mitigation Strategies · 2026 · DOI

  • Therefore, the present findings sup- port further investigation on the effect of this toothpaste formulation in biofilm models to reduce tooth demineral- ization, without allowing, at this stage, direct extrapola- tion of an anticaries effect from the current intraoral data.

    Intraoral fluoride retention after using experimental toothpaste containing titanium tetrafluoride and chitosan · 2026 · DOI

  • consumed fluoride is available As the first research of its kind, this study addresses a critical gap in knowledge and provides a foundation for future studies focused on examining factors that can influence fluoride bio-accessibility

    Assessment of fluoride bio-accessibility in early childhood diets · 2025 · DOI

  • To date, limited studies have examined the association of fluoride with blood pressure.

    Relationship between urinary and water fluoride with cardiovascular risk factors in children and adolescents in Yazd city · 2026 · DOI

  • The exact nature of fluoride and its impact on tissues still remains controversial due to the inadequacy of clinical in vivo studies on humans.

    Comparative evaluation of the cytotoxic effects of fluoridated and non- fluoridated toothpaste on the buccal mucosa: A 12 week follow up- a randomized controlled study · 2026 · DOI

  • Clinical correlates were not investigated, such as plaque levels, changes in attachment levels over time, or response to periodontal therapy.

    Ultrastructural alterations of cementum and periodontal ligament in fluorosed teeth: an SEM and EDS study · 2026 · DOI

  • The results revealed that respondents had limited knowledge and awareness of fluoride-associated health risks and exhibited significant demand for defluoridation systems.

    Determinants of Safe Water Access: Household Water Use and Demand for Defluoridation in High-Fluoride Groundwater Exposure Areas · 2026 · DOI

  • Future research could focus on improving water quality criteria derivation and risk assessment methods through integrated predictive modeling and expanded toxicity datasets.

    Water Quality Criteria and Ecological Risk Assessment of Fluoride for the Protection of Water Organisms in Surface Water · 2026 · DOI

  • Excessive fluoride exposure induces developmental neurotoxicity, but effective preventive strategies are currently scarce.

    Combining Network Pharmacology and Experimental Verification to Investigate the Protective Effect of Melatonin on Fluoride-Induced Brain Injury · 2026 · DOI

  • Moderate dental fluorosis (MF) represents a pivotal yet understudied stage of enamel fluorosis, characterized by distinct opacities indicating substantial but incomplete enamel disruption.

    Salivary Proteomic Signatures Reveal Novel Mechanistic Insights into Moderate Dental Fluorosis Pathogenesis and Oral Homeostasis Disruption · 2026 · DOI

  • Despite its prevalence, the molecular basis underlying this transitional phenotype remains unclear.

    Salivary Proteomic Signatures Reveal Novel Mechanistic Insights into Moderate Dental Fluorosis Pathogenesis and Oral Homeostasis Disruption · 2026 · DOI

  • While groundwater has been extensively studied as the primary hydrological carrier of fluoride, the distribution patterns and mechanisms of fluoride in surface water remain poorly understood, particularly in large-scale river systems.

    Spatial variation of fluoride and sub-basin driving factors in the surface water of Huai River Basin · 2026 · DOI

  • FEX activity is sodium-dependent, but the mechanism for Na+ activation and the impact of other cations on FEX function remain poorly understood.

    Monovalent cations differentially regulate the activity of eukaryotic fluoride channels and impact fluoride resistance · 2026 · DOI

  • Future research should focus on optimizing ribozyme delivery systems to enhance their stability and efficiency within target cells.

    Low Fluoride Regulates Macrophage Polarization Through Mitochondrial Autophagy Mediated by PINK1/Parkin Axis · 2025 · DOI

  • The results of these findings pave the way for further research on prevention of groundwater pollution due to geogenic migration.

    Simulation of fluoride transport in groundwater using visual MODFLOW flex and Human Health Risk Assessment · 2025 · DOI

  • Given the importance of maternal thyroid hormones for fetal neurodevelopment, replication of findings is warranted.

    Fluoride exposure and thyroid hormone levels in pregnancy: The MIREC cohort · 2024 · DOI

  • There is insufficient evidence to determine the effect of cessation of CWF on caries and whether water fluoridation results in a change in disparities in caries according to socioeconomic status.

    Water fluoridation for the prevention of dental caries · 2024 · DOI

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94 gap statements have been mined from Fluoride Effects and Removal papers in our 4.5M-paper local library, which holds 978 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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